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/usr/include/boost/beast/core/detail

Name	Size	Mode	Actions
impl/	-	0755	rm
allocator.hpp	945	0644	edit dl rm
async_base.hpp	901	0644	edit dl rm
base64.hpp	1942	0644	edit dl rm
base64.ipp	6170	0644	edit dl rm
bind_continuation.hpp	3504	0644	edit dl rm
bind_default_executor.hpp	3243	0644	edit dl rm
bind_handler.hpp	10959	0644	edit dl rm
buffer.hpp	1825	0644	edit dl rm
buffers_pair.hpp	2636	0644	edit dl rm
buffers_range_adaptor.hpp	2651	0644	edit dl rm
buffers_ref.hpp	1648	0644	edit dl rm
buffer_traits.hpp	2095	0644	edit dl rm
chacha.hpp	4167	0644	edit dl rm
char_buffer.hpp	1407	0644	edit dl rm
clamp.hpp	1229	0644	edit dl rm
config.hpp	2884	0644	edit dl rm
cpu_info.hpp	1787	0644	edit dl rm
flat_stream.hpp	1919	0644	edit dl rm
get_io_context.hpp	2338	0644	edit dl rm
is_invocable.hpp	1888	0644	edit dl rm
ostream.hpp	7004	0644	edit dl rm
pcg.hpp	1464	0644	edit dl rm
read.hpp	9217	0644	edit dl rm
remap_post_to_defer.hpp	2152	0644	edit dl rm
service_base.hpp	850	0644	edit dl rm
sha1.hpp	1624	0644	edit dl rm
sha1.ipp	7998	0644	edit dl rm
static_const.hpp	1154	0644	edit dl rm
static_ostream.hpp	3030	0644	edit dl rm
static_string.hpp	3030	0644	edit dl rm
stream_base.hpp	2685	0644	edit dl rm
stream_traits.hpp	2796	0644	edit dl rm
string.hpp	898	0644	edit dl rm
temporary_buffer.hpp	1611	0644	edit dl rm
tuple.hpp	2194	0644	edit dl rm
type_traits.hpp	2779	0644	edit dl rm
variant.hpp	4889	0644	edit dl rm
varint.hpp	1712	0644	edit dl rm
win32_unicode_path.hpp	2148	0644	edit dl rm
work_guard.hpp	1851	0644	edit dl rm

Edit: /usr/include/boost/beast/core/detail/buffer.hpp (1825B)

//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/beast
//

#ifndef BOOST_BEAST_CORE_DETAIL_BUFFER_HPP
#define BOOST_BEAST_CORE_DETAIL_BUFFER_HPP

#include <boost/beast/core/error.hpp>
#include <boost/asio/buffer.hpp>
#include <boost/optional.hpp>
#include <stdexcept>

namespace boost {
namespace beast {
namespace detail {

template<
    class DynamicBuffer,
    class ErrorValue>
auto
dynamic_buffer_prepare_noexcept(
    DynamicBuffer& buffer,
    std::size_t size,
    error_code& ec,
    ErrorValue ev) ->
        boost::optional<typename
        DynamicBuffer::mutable_buffers_type>
{
    if(buffer.max_size() - buffer.size() < size)
    {
        // length error
        ec = ev;
        return boost::none;
    }
    boost::optional<typename
        DynamicBuffer::mutable_buffers_type> result;
    result.emplace(buffer.prepare(size));
    ec = {};
    return result;
}

template<
    class DynamicBuffer,
    class ErrorValue>
auto
dynamic_buffer_prepare(
    DynamicBuffer& buffer,
    std::size_t size,
    error_code& ec,
    ErrorValue ev) ->
        boost::optional<typename
        DynamicBuffer::mutable_buffers_type>
{
#ifndef BOOST_NO_EXCEPTIONS
    try
    {
        boost::optional<typename
            DynamicBuffer::mutable_buffers_type> result;
        result.emplace(buffer.prepare(size));
        ec = {};
        return result;
    }
    catch(std::length_error const&)
    {
        ec = ev;
    }
    return boost::none;

#else
    return dynamic_buffer_prepare_noexcept(
        buffer, size, ec, ev);
#endif
}

} // detail
} // beast
} // boost

#endif

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